<template>
   <view>
     <!-- <my-search :bgcolor="'black'"></my-search> -->
     <my-search @myclick="gotoSearch"></my-search>
      <view class="scroll-view-container">
      <scroll-view class="left-scroll-view" scroll-y :style="{height: wh + 'px'}">
        <block v-for="(item, i) in cateList" :key="i">
         <view :class="['left-scroll-view-item', i === active ? 'active' : '']" @click="activeChanged(i)">{{item.cat_name}}</view>
        </block>
      </scroll-view>
        <!-- 右侧的滚动视图区域 -->
        <scroll-view class="right-scroll-view" scroll-y :style="{height: wh + 'px'}" :scroll-top="scrollTop">
        <view class="cate-lv2" v-for="(item2, i2) in cateLevel2" :key="i2">
           <view class="cate-lv2-title">/ {{item2.cat_name}} /</view>
             <!-- 动态渲染三级分类的列表数据 -->
             <view class="cate-lv3-list">
                   <!-- 三级分类 Item 项 -->
                   <view class="cate-lv3-item" v-for="(item3, i3) in item2.children" 
                   :key="i3" @click="gotoGoodsList(item3)"
                   >
                     <!-- 图片 -->
                     <image :src="item3.cat_icon"></image>
                     <!-- 文本 -->
                     <text>{{item3.cat_name}}</text>
                   </view>
                 </view>
         </view>
        </scroll-view>
    </view>
     </view>
</template>

<script>
  // import mySearch from '../../components/my-search.vue'
  import badgeMix from '../../minxins/tabbar-badge.js'
  export default {
     mixins: [badgeMix],
    // components:{
    // 			mySearch
    // 		},
    data() {
      return {
        wh:0,
          cateList: [],
          active:0,
           cateLevel2: [],
           scrollTop: 0

      };
    },
     onLoad() {
          // 获取当前系统的信息
          const sysInfo = uni.getSystemInfoSync()
          // 为 wh 窗口可用高度动态赋值
          this.wh = sysInfo.windowHeight -50
            this.getCateList()
        },
    methods:{
      async getCateList() {
          // 发起请求
          const { data: res } = await uni.$http.get('/api/public/v1/categories')
          // 判断是否获取失败
          if (res.meta.status !== 200) return uni.$showMsg()
          // 转存数据
          this.cateList = res.message
            // 为二级分类赋值
           this.cateLevel2 = res.message[0].children
        },
         activeChanged(i) {
            this.active = i
              // 为二级分类列表重新赋值
               this.cateLevel2 = this.cateList[i].children
               this.scrollTop = this.scrollTop === 0 ? 1 : 0
          },
          gotoGoodsList(item3){
             uni.navigateTo({
                url: '/subpkg/goods_list/goods_list?cid=' + item3.cat_id
              })
          },
          gotoSearch(){
             uni.navigateTo({
                   url: '../../subpkg/search/search'
                 })
          }
    }
  }
</script>

<style lang="scss">
.scroll-view-container {
  display: flex;

  .left-scroll-view {
    width: 120px;

    .left-scroll-view-item {
      line-height: 60px;
      background-color: #f7f7f7;
      text-align: center;
      font-size: 12px;

      // 激活项的样式
      &.active {
        background-color: #ffffff;
        position: relative;

        // 渲染激活项左侧的红色指示边线
        &::before {
          content: ' ';
          display: block;
          width: 3px;
          height: 30px;
          background-color: #c00000;
          position: absolute;
          left: 0;
          top: 50%;
          transform: translateY(-50%);
        }
      }
    }
  }
}
.cate-lv2-title {
  font-size: 12px;
  font-weight: bold;
  text-align: center;
  padding: 15px 0;
}

.cate-lv3-list {
  display: flex;
  flex-wrap: wrap;

  .cate-lv3-item {
    width: 33.33%;
    margin-bottom: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;

    image {
      width: 60px;
      height: 60px;
    }

    text {
      font-size: 12px;
    }
  }
}
</style>
